16/48=1/3

34/51=2/3

Vì: 2>1 nên: 1/3<2/3

=>16/48<34/51

Vậy:16/48<34/51 

16/48=1/3

34/51=2/3

mà 1/3<2/3

nên 16/48<34/51

\(\dfrac{16}{48}=\dfrac{1}{3}\)

\(\dfrac{34}{51}=\dfrac{2}{3}\)

Vì 2>1 nên \(\dfrac{1}{3}< \dfrac{2}{3}\)

\(=>\dfrac{16}{48}< \dfrac{34}{51}\)

Vậy \(\dfrac{16}{48}< \dfrac{34}{51}\)

Chúc bạn học tốt

\(\frac{16}{48}=\frac{16:16}{48:16}=\frac{1}{3}\);\(\frac{14}{35}=\frac{14:7}{35:7}=\frac{2}{5}\)

\(\frac{1}{3}=\frac{1\cdot5}{3\cdot5}=\frac{5}{15}\);    \(\frac{2}{5}=\frac{2\cdot3}{5\cdot3}=\frac{6}{15}\)

`8/16=1/2`

`1<5-> 8/16<5/2`

34/51=2/3

Cac so bang no la va co mau so be hon 16 la:12/15;8/12;6/9;4/6

Thack nho k cho minh nhe day la dap an dung 100%

Co bai nao kho nao kho tu lop 1den lop chin minh se tra loi

=2/3

CÁC PHÂN SỐ BẰNG LÀ;4/6              

8/12 

6/9

10/15

nhạc

có 1 vần

TL

12/6=2

28/21=4/3

NHÉ

HT

giúp mình với ạ, mình sẽ tick. Cảm ơn các bạn!

`->C` 

`34/51= (34: 17)/(51:17)=2/3`

`->D`

`9/16 +1/4= 9/16+ 4/16=13/16`

a. C. \(\dfrac{34}{51}\)

b. D.\(\dfrac{13}{16}\)

Cách 1 :

Rút gọn : 12/16 = 3/4  ,   28/21 = 4/3

So sánh : 12/16 < 28/21

Cách 2 :

So sánh Vì 12/16 < 1 và 28/ 21 > 1 nên 28/21 > 12/16

a) 

\(\dfrac{6}{12}=\dfrac{6:6}{12:6}=\dfrac{1}{2}\)

\(\Rightarrow\dfrac{1}{2}=\dfrac{1\times2}{2\times2}=\dfrac{2}{4}\)

Mà \(\dfrac{2}{4}< \dfrac{3}{4}\)

Vậy \(\dfrac{6}{12}< \dfrac{3}{4}\).

b)

\(\dfrac{8}{10}=\dfrac{8:2}{10:2}=\dfrac{4}{5}\)

Mà \(\dfrac{2}{5}< \dfrac{4}{5}\)

Vậy \(\dfrac{2}{5}< \dfrac{8}{10}\).

c)

\(\dfrac{40}{35}=\dfrac{40:5}{35:5}=\dfrac{8}{7}\)

Mà \(\dfrac{8}{7}>\dfrac{6}{7}\)

Vậy \(\dfrac{40}{35}>\dfrac{6}{7}\).

d)

\(\dfrac{8}{16}=\dfrac{8:8}{16:8}=\dfrac{1}{2}\)

Mà \(\dfrac{1}{2}< \dfrac{5}{2}\)

Vậy \(\dfrac{8}{16}< \dfrac{5}{2}\).